Detachable wheel.



A. 3.1. CHAPMAN.

DETACHABLE WHEEL.

APPLICATION FILED 1uLY11.1913.

l ,21 9,8 1 O; f vPatenfed Mar. 20, 1917.

2 SHEETS-SHEET l.

11 l l 1 "'-1 i2 13 J 12 i" 5 j Witnesses Inventor,

A 5 1 MAA-m. P-qbLm/AQ Per Attorney.

A. 8.1. CHAPMAN.

DETACHABLE WHEEL.

APPLlcATloN FILED 1uLY11,1913.

Patented Mar. v2O, A1917.

v2 SHEETS-SHEET 2.

g/PGMLMV l Ww 7 A-.J Cha/aman.

ARTHUR STANLEY JAMES CHAPMAN, OF DERBY, ENGLAND.

DETACHABLE WHEEL.

Specication of Letters Patent. Patented Ig-u. 20, 1917.

Application med July 11, 1913. seria1 No. 778,568.

To all whom t may concern:

Be it known that I, ARTHUR STANLEY 'i JAMES CHAPMAN, a subject of the King of Great Britain, and a residentl of Derby, England, (whose postoice address is 6 Mill Hill road, Derby, in the county of Derby, England,) have invented Improvements Relating to Detachable Wheels, of which the following is a specification.

This invention relates to detachable wheels, and its chief advantage is the great facility with which it enables a wheel to be taken off its axle or replaced in a remarkablyshort space of time.

The rapidity with which a wheel can .be removed or replaced with the aid of my 1nvention depends partly upon the fact that I divide up the thread of the securingcap into sections and the axle end on which it is secured likewise, somewhat after the fashion of the breech block of heavy ordnance. I also provide that the act of unscrewing said capshall exert an axial pull upon the wheel which will insure its being withdrawn oft' the axle end instead vof re maining tightly wedged thereon `-through rust or other causes.

In order to explain the nature of my invention I will describe the same morefully with the aid of the accompanying drawings in which Figure 1 is a section of the cap,

Fig. 2 an elevation of the hub, Fig. 3 a sec tional elevation of the complete hub and cap in unlocked position, and Fig. 4 half a cross section and half a side elevation of the same. Fig. 5 is a portion of Fig. 3 in a slightly altered position.

The hub shell 1 is provided withv a circumferential flange 2 upon its outer face separated from the main part of the shell by a circumferential groove 3.

The securing cap 4 which is practically j nut, is surrounded by an internally channeled ring 5,- of particular`formation, and is provided with a flange 6 on its inner edge of greater diameter than itself, which flange extends into'the channel of the ring 5, so that the two are inseparable although relative rotation is possible. The channel is roughly about twice the width of the cap flange 6, so that there is still room for another lange to lie in it, namelythe flange 2 on the hub shell previously mentioned. The shell 1 is thus tied to the ring 5 also, and relative rotation is prevented in some suitable manner, such as by a. recess or recesses in the circumferential faces of the annular joint in conjunction with a locking ball or balls 7 common to each. It will be obvious that .the channeled ring 5 must be divided into two semi-circles-divided as at 8, Fig. 3-in order to fit it in position. Hence it is itself surrounded by a continuous outer band 9 which can be secured by a screw 10 'passed through it into the ring.

A locking device to prevent the return of the cap 4 upon its thread comprises a series of hemispherical depressions 11 in the pe-v riphery of the cap flange 6, forming a kind of ratchet, in conjunction with which is a ball 12 free to move up and down within a radial perforation made in the substance of the ring 5 and band 9 through the bottom of the channel in the former. This ball is pressed upon by a small plunger 13 attached to the end of a leaf spring 14, but other equivalent devices may be used, the object being to check the rotation of the cap or nut 4 in either direction. This device may be repeated at another point or points about the cap. The spring 14 is generally suiicient to lock the cap for all ordinary purposes, but if an absolute lock is essential, all that is necessary to do is to turn the band 9 a little upon the'ring 5, so that the perforation in the former is completelyjclosed by the band. The tip of the plunger 13 that is, so much of it as lieswithin the ring 5 Will of course require tobe separated from the portion in the band 9 but this is a meredetail. An elongated slot 15 is shown in the band 9 in Fig. from which it will be"evi dent that if the securing screw 10 is iirst loosened, the band 9 can be rotated through the small distance necessary for locking the ball 12 and can then be fixed by tightening up the screw 10 again.

The thread of the securing cap 4 is di vided into two equal sections 16, Figs. 1 and 3, and that of the hub 17, Fig. 2 into two corresponding equal sections 18. r' The hub shell 1 is prevented from turning upon the hub 17 by a key or keys 19 fixed thereon, suitable recesses for taking the same being provided inside the shell 1, permitting however axial movement in relation one to the other. The cap 4 may be rotated in any manner but preferably by the aid of a strap or hook Spanner having a stud which engages in the hole 20, Fig. 1.

Relative motion between the ring 5 and the shell 1 is required to be avoided (such as by the ball 7) only when the ratchet and balls 11 and 12 respectively are employed. If no such locking of the cap upon its thread is necessary, then the ring 5 need not itself be keyed. This ring could be dividedy up into any desired number of segments instead of two only.

Although the threads 16, 18 are not shown taper on the drawings, it will be evident that they may be upon a taper if desired.

I claim:

l. In a detachable wheel, a hub shell having an outward annular flange at its outer face, a hub on which the shell is mounted, means for ke'ying said shell upon the hub, a securing cap having an outward annular flange at its inner face, formed with a ratchet in it and equal in diameter to the I aforesaid flange on the'hub shell, said cap being adapted to'grip upon the end of the hub when a screwing motion is imparted to it, an internally channeled ring surrounding the said abutting flanges of the shell and ot the cap, a spring-pressed pawl free to slide within a radial perforation in, the said ring and to engage with the said ratchet, and means for preventing relative rotation 'of the ring and the hub shell respectively.

2L In a. detachable Wheel, a hub shell havoutward annular flange at its outer hub on which the shell is mounted,

ing an face, a

`liange at its inner face,

means for keying4 said shell upon the hub, a securing cap having an outward annular formed with a ratchet in it and equal in diameter to the aforesaid flange on the hub shell, said cap being adapted to grip upon the end of the hub when a screwing motion is imparted to it, an internally channeled ring divided into segments surrounding the said abutting flanges of the shell and of the cap, a band surrounding the said ring, a spring-pressed pawl free to slide within a radial perforation penetrating both the said ring and said band and to vengage with the said ratchet,

said pawl being divided in length into two portions, one within the ring and the other within the band, means for securing said band either in the position in which the pawl can cooperate freely with the ratchet when only a restraint upon the rotation of the cap is desired or else in the position in which the pawl is held locked upon the ratchet it itis desired that the cap shall be irreniovably secured, and means for preventing relative rotation ot' the ring and the hub shell respectively.

ARTHUR STANLEY JAMES CHAPMAN. 

